alphagov/whitehall — pull request #265 by tomafro (2013-02-21 19:59:38+00:00)
Title: Recognise file type of uploads with upper case file names

The content type used when sending uploads to the user is based on
the file extension. However, previously it didn't correctly
recognise uppercase file extensions, causing problems like this[1].

[1] https://www.pivotaltracker.com/story/show/44879513